v3.26.1
Additional disclosures - Parent company condensed statements of income (Details) - EUR (€)
€ in Millions
8 Months Ended 12 Months Ended
Aug. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Condensed Income Statements, Captions [Line Items]        
Interest income   € 101,710.0 € 109,012.0 € 101,742.0
Dividend income   715.0 710.0 568.0
Interest expense   (59,362.0) (65,225.0) (61,092.0)
Non-interest income [1]   1,583.0 846.0 1,137.0
Non-interest expense   (2,429.0) (2,595.0) (3,066.0)
Operating profit/(loss) before tax € 6,193.0 18,681.0 17,347.0 15,005.0
Tax expense or income from continuing operations € (635.0) (4,723.0) (4,844.0) (3,880.0)
Income/ (charges) for the period from continuing operations   13,958.0 12,503.0 11,125.0
Net profit from discontinued operations   1,542.0 1,241.0 1,058.0
Profit/(loss) for the year   15,500.0 13,744.0 12,183.0
Banco Santander, S.A. | Reportable Legal Entities        
Condensed Income Statements, Captions [Line Items]        
Interest income   31,363.0 34,752.0 31,854.0
Dividend income   6,070.0 7,113.0 8,805.0
Interest expense   (18,170.0) (20,112.0) (16,204.0)
Interest income / (charges)   13,193.0 14,640.0 15,650.0
Impairment losses charged to income for the year   (1,162.0) (1,334.0) (1,372.0)
Interest income / (charges) after provision for credit losses   12,031.0 13,306.0 14,278.0
Non-interest income   6,981.0 5,502.0 4,777.0
Non-interest expense   (7,848.0) (8,552.0) (9,662.0)
Operating profit/(loss) before tax   11,164.0 10,256.0 9,393.0
Tax expense or income from continuing operations   (1,073.0) (1,091.0) (533.0)
Income/ (charges) for the period from continuing operations   10,092.0 9,167.0 8,860.0
Net profit from discontinued operations   1,021.0 935.0 378.0
Profit/(loss) for the year   11,113.0 10,101.0 9,239.0
Banco Santander, S.A. | Reportable Legal Entities | Earning assets        
Condensed Income Statements, Captions [Line Items]        
Interest income   25,293.0 27,639.0 23,049.0
Banco Santander, S.A. | Reportable Legal Entities | Bank subsidiaries        
Condensed Income Statements, Captions [Line Items]        
Dividend income   5,029.0 6,248.0 7,790.0
Banco Santander, S.A. | Reportable Legal Entities | Non-bank subsidiaries        
Condensed Income Statements, Captions [Line Items]        
Dividend income   € 1,041.0 € 865.0 € 1,015.0
[1] Includes EUR -486 million at 31 December 2025 (EUR -1,225 and EUR -1,016 at 31 December 2024 and 2023, respectively) derived from the net loss generated in Argentina as a result of the application of IAS 29 Financial reporting in hyperinflationary economies.